package day14;

/**
 * @author oldliu
 * @since 1.0
 */
public class ForTest9 {
    public static void main(String[] args) {
        Ball b=new Ball();
        b.r=12;
        System.out.println(b.r);//12
        Circle c3=b;
        System.out.println("c3.r="+c3.r);
        Circle c=new Ball();
        c.r=12.55;
    }
}
